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24 results for “Sphingonotus”
Figure 2 from: Peralta-Rincon JR, Escudero G, Edelaar P (2017) Phenotypic plasticity in color without molt in adult grasshoppers of the genus Sphingonotus (Acrididae: Oedipodinae). Journal of Orthoptera Research 26: 21-27. https://doi.org/10.3897/jor.26.14550
Figure 2 - Average changes in color over time (days since the start of each treatment) for adult azure sand grasshoppers kept on bluish-gray stones (blue symbols and lines) or reddish-brown soil (red symbols and lines). Color is expressed in the three independent dimensions of the CIE-L*a*b* space (see text). Lines show the predicted values for each CIE-L*a*b dimension according to a fitted model containing Time, Substrate, Sex, Time:Substrate and sqTime; we excluded the subject random effect for better visualization. Continuous lines and circles are for females while dashed lines and triangles are for males. The "Red Earth" treatment had to be restarted using grasshoppers from the same field location but captured later in time. As a result, the timing of data collection is out of phase between treatments, and L is initially slightly lower for "Red Earth" individuals (since the species gets darker with age).
Figure 4 from: Peralta-Rincon JR, Escudero G, Edelaar P (2017) Phenotypic plasticity in color without molt in adult grasshoppers of the genus Sphingonotus (Acrididae: Oedipodinae). Journal of Orthoptera Research 26: 21-27. https://doi.org/10.3897/jor.26.14550
Figure 4 - Change in color over time for two example individuals. From left to right: at the start of the experiment, 7 weeks later, and after freezing and cleaning at the end of the experiment. Individual a. was kept on blue-gray substrate and individual b. was kept on reddish-brown substrate. For visualization, the bars under the images show the average dorsal color as captured by the CIE-L*a*b* values measured for each individual at each point in time.
Figure 3 from: Peralta-Rincon JR, Escudero G, Edelaar P (2017) Phenotypic plasticity in color without molt in adult grasshoppers of the genus Sphingonotus (Acrididae: Oedipodinae). Journal of Orthoptera Research 26: 21-27. https://doi.org/10.3897/jor.26.14550
Figure 3 - Individual changes in color in the final surviving azure sand grasshoppers when kept on bluish-gray stones (blue lines, N = 2) or reddish-brown soil (red lines, N = 3). The comparison is between the same individuals at the beginning of the experiment and once frozen and cleaned at the end. Color is expressed in the three independent dimensions of the CIE-L*a*b* space (see text).
Figure 1 from: Peralta-Rincon JR, Escudero G, Edelaar P (2017) Phenotypic plasticity in color without molt in adult grasshoppers of the genus Sphingonotus (Acrididae: Oedipodinae). Journal of Orthoptera Research 26: 21-27. https://doi.org/10.3897/jor.26.14550
Figure 1 - Example of an image taken for color measurement. The individual was held in place by the transparent plastic lid of the Petri dish to obtain a correct position. Brightness and hue were measured in the red diamond-shaped part of the thorax. The color of a small area of the background paper was also measured (red circle) as a reference gray standard to correct for lighting variation among images.
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